8 
.Vs })rovi()usly stated, J^slJinrhi luiv(' heen obtained from th(‘ cores of 
the Jleatlicote Bore, but they have not ecmie uihUt my notice ; neither have 
those said to have 1)een found in the nntinislied hor(‘ at Liverpooi. 
The frequent distortion of the valva^s fi'om tlie Moore Park and hii^her 
horizons in tlie Dent’s Creek Bore renders eom])arison with hitherto descril)ed 
s])ccics difficult, hut if we regard Pig. 1 as a ty])ical outline of J^. Coghlcmi, it 
accords better with one of Professor Jones’ tignrc's of the Triassic E. m/inuta^ 
than with any other known to me. 
LocaHtica. — 1, Moore Park Bore, Baptist’s Gardens, Bourke-street, 
Surry Hills, Sydney (Dr. J. C. Cox) ; 2, Botany Bore, llolt-Sutherland 
Estate, Port Hacking (Dr. J. C. Cox) ; 3, Dent’s Creek Bore, Holt-Suthcr- 
land Estate, George’s Eiver (T. TV. E. David, Esq., B.A., Sfc.) 
Horizon. — Estheria Shales, above ])roductivc Coal Measures (see table, 
p. 1). 
Collection . — Only those examples from the Dent’s Creek Bore are in 
the Mining and Geological Museum. 
PELECYPODA. 
f Oer/cn.— UliioiUlCffil. 
Eamihj.— UNIONUEE. 
Genus UNIO. — liclzius, 1788. 
(1 )issertatio Hist. Nat. p. Hi.) 
Ohs . — The shells found hy Mr. David at Waterloo and the Surry Hills 
tire provisioually referred to the genus U)iio. I am able to detect several 
important characters of this genus, whilst others of equal signilicance have 
not been noticed. Either this is due to the state of preservation of the 
specimens, or from the fact that they may belong, not to Unio, but an allied 
g(miis. The Unioniform shells of the Palmozoic Bocks are usually referred 
to Carhonieola , M'Coy, and Anthracosia, King; hut in the present remains 
the distinguishing features of these genera are not apparent. Pour species 
* Mon. Foss. Estheria?, Pal. Soc. , 1862, t. 12, f. 1. 
